Independent Peptide Vendor Testing and Research Guides
Verified vendor reviews, evidence-based protocols, and practical guides—built for researchers who demand accuracy.
For research and educational purposes only. Not medical advice.
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New to Peptides?
Start here. Our beginner roadmap covers everything from equipment to your first protocol—no prior knowledge required.
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Vendor Reviews
Independent testing analysis of nine peptide vendors. See who passes purity verification and who doesn’t.
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Peptide Guides
Deep-dive guides on BPC-157, GHK-Cu, TB-500 and more. Research, protocols, and practical insights.
FEATURED
Top Verified Vendors
The three vendors in Tier 1 of our vendor review — the only ones we’re comfortable recommending to a first-time buyer.
| Vendor | Known For | Coupon | Our Review | |
|---|---|---|---|---|
| Ascension Peptides | On-page COAs from multiple third-party labs | SUBQPROTOC — 50% off | Read review → | Visit → |
| Apollo Peptide Sciences | Janoshik-verified COAs, GLP-1 specialist | FDN15 — 15% off | Read review → | Visit → |
| Core Peptides | Best first-order experience (not an affiliate — unpaid pick) | — | Read review → | Visit → |
Rankings based on third-party COA verification. See the full 2026 vendor review and methodology →
Disclosure: Ascension and Apollo links are affiliate links — we may earn a commission at no cost to you. This never affects rankings; Core Peptides is listed with no affiliate relationship. Full disclosure →
GUIDES
Peptide Guides
Every guide covers the mechanism, the actual research (human and animal, clearly separated), practical handling, and where to source a tested product.
Guide
BPC-157 Complete Guide
The body protection compound: mechanisms, research, dosing, and what the evidence actually supports.
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TB-500 Complete Guide
The thymosin beta-4 fragment for cell migration and healing — biology, research, and practical notes.
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BPC-157 vs TB-500
Head-to-head: where each peptide fits, when to stack them, and what the animal data really shows.
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GHK-Cu Complete Guide
The copper peptide with real human trial data for skin, wound healing, and collagen.
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MOTS-c Complete Guide
The mitochondrial “exercise mimetic” peptide: metabolism, endurance, and the evidence so far.
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Peptides for Mitochondrial Energy
Can peptide therapy help fatigue rooted in mitochondrial dysfunction? What the research shows.
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Peptides for Ehlers-Danlos Syndrome
What helps, what doesn’t, and the specific warnings for EDS, MCAS, and POTS.
Library
All Peptide Guides →
Browse the full library, updated as new guides are published.
REVIEWS
Vendor Reviews & Where to Buy
We rank vendors on one thing above all: can you independently verify what’s in the vial? Batch-specific COAs from named third-party labs, or nothing.
Review
2026 Peptide Vendor Review
Nine vendors ranked by third-party testing and COA transparency. Start here before you buy anything.
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Ascension Peptides Review
On-page COAs from multiple labs, 50% off with SUBQPROTOC, and the caveats.
Review
Apollo Peptide Sciences Review
Janoshik-verified COAs and a GLP-1-heavy catalog. Code FDN15 for 15% off.
Buying
Where to Buy GLP-1 Peptides
Semaglutide, Tirzepatide, and Retatrutide: which vendors publish real testing.
TOOLS
Tools & How-To
The practical side: getting a vial from the box to a correctly dosed syringe without wasting product.
How-To
How to Reconstitute Peptides
Step-by-step: bacteriostatic water, ratios, storage, and the mistakes that ruin a vial.
Tool
Peptide Dosage Calculator
Convert mg, mcg, and insulin-syringe units for any vial size and concentration.
How-To
Essential Peptide Equipment
The complete setup for under $100 — syringes, BAC water, alcohol swabs, storage.
The SubQ Protocol Approach
We’re not doctors. We’re researchers who got tired of scattered information, shady vendors, and forums full of broscience.
Every vendor review includes COA verification. Every guide cites actual research. No hype, no medical claims—just the information you need to make informed decisions.
FREE GUIDE
Get the Peptide Starter Guide
Everything you need before your first purchase—vendor verification, equipment lists, reconstitution steps, and safety fundamentals. Free, instant download.
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